Electric coal-cutter



{No Model.) 3 Sheets-Sheet 1. I. E. S'TOREY. ELECTRIC GOALGUTTBR.

Patented Mar. s, 1896.

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LITHUANASMINGTDKRC.

(No Model.) 3 sheets-sheet 2.

I. E. STORE-Y. ELECTRIC GOAL GUTTER.

No. 555,832. AP tented'Mar. 3, 18196.

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(No Model.)

3 sheets-sheet a.

LILSTQRIEYl`4 ELECTRIC CUAL GUTTER.

Patented Maf. 3, 1896.

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AN DREW BLRAHAM. PHuTD-LITHD-WASNINGrDN, D C

llrvrrn Srarns .arent rrrcE@ IMLE E. STOREY, OF BOULDER, COLORADO, ASSIGNOR TO TI'IE STOREY ELECTRIC DRILL AND POIVER COMPANY, OF COLORADO.

ELECTRIC COAL-CUTTER.

SPECIFICATION forming part of Letterslatent No. 555,832, dated March 8, 1896.

Application filed December 20, 1890. Serial No. 375,290. (No model.)

To all whom t may concern:

3e it known that I, IMLE E. STOREY, a citizen of the United States, residing in Boulder, county of Boulder, State of Colorado, have invented certain new and useful Improvements in Electrical Coal-Cutting Machines, of which the following is a specification.

This invention relates to coal-cutters which are used in coalmines for cutting out coal.

The objects of this invention are to provide a coal-cutter which shall be operated by electricity and which shall be compact in construction and simple in operation.

It is also the object to provide a cutter which will cut coal on either side of the machine and which will work speedilyv and make a narrow korf.

The invention also has other objects which will be brought out in the following description.

Referring to the drawings, Figure l represents a plan of the machine; Fig. 2, a side elevation; Fig. 3, a section on line 0c a" of Fig. l Fig. 4, a section on line y y of Fig. l Fig. 5, an end elevation of the feeding mechanism, and Fig. 6 two views of the cutting-chain.

A represents the main frame of the machine. It consists of a rectangular frame of iron, having two long sides and short end pieces. On the inside of the side pieces tracks a are formed or secured, upon which the motor and cutter-frame slide.

a represents two threaded rods located just above and adjacent to the tracks on each side of the frame, running throughoutl its length and mounted lixedly in the ends or corners of the frame.

B represents the motor and cutter-frame. It is provided with grooves l), which fit over the tracks a. The frame has side pieces, b, in which the said grooves are formed, which stand parallel with the side pieces of the frame A.

The frame B supports an electric motor` consisting of a four-pole field-magnet M, an armature M/ and a commutator M2, the shaft of which is represented by M3. The shaft has its bearings in the pillow-block b2. One end of the shaft projects through its bearing and carries a pinion b4, which engages with a gear b5, fast upon a counter-shaft O, having its bearings suitably located in the frame B. This counter-shaft extends through and between the field-magnet coils of the motor and carries on its eXtreme end a frictiondisk 0. Near each end of this shaft and mounted uponit by means of a feather are two bevelpinions o' o2, which are provided with forks and levers 03 for the purpose of sliding them along the shaft- O. These pinions are adapted to engage one at a time with a large horizontal bevel-wheel P, secured tightly upon a short vertical shaft P' and having its bearings in the hub of the structure p p'. lower end of the shaft P' is below the bottom of the frame A and carries at its lower end a large sprocket-wheel S, which is housed between two long steel plates s s, constitut ing the cutter-arm- These plates are separated and braced by blocks s for the purpose of lightness and strength.

The end of the cutter-arm through which the shaft P/ projects is the pivotal end, and it is` supported by the two disks p p', bolted together, as shown. The disk p is bolted to the cutter-arm, and the disk p is a worm-gear engaging with a worm on shaft Q. The disks are provided with ball-bearings located on the opposite sides of an annular horizontal flange p2, forming part of the frame B. The cutter-arm is nearly as long asthe frame A. It is tapering, being narrower at its outer or free end. The cutting-chain C passes around The the sprocketwvheel S at the pivotal end and around the smaller sprocket-wheel S at the outer end of the arm. It is supported by idlers S2. The wheel S is mounted in an adjustable box for the purpose of taking up stretch or slack of the chain. From. the description of the apparatus so far it will be seen that the chain is driven by the motor through the pinion b4, wheel b5, shaft O, pinion o or 02, gear P, shaft P and wheel S.

I will now describe the mechanism for automatically swinging the cutter-arm either to one side or the other of the frame A and for simultaneously moving or feeding the frame B, with what it carries, along the frame A.

fr represents a friction-pinion engaging with the surface of the friction-disk o on the end of the shaft 0. This pinion is adapted to j slide on a lateral shaft r mounted in eccen- IOO Aits speed and direction of rotation.

tric bearings, which will be described. This pinion is also connected with a threaded nut T2, through which passes a threaded shaft T3 parallel to the shaft T and fitted with a crank at its end for the use of anoperator. By turning this crank the friction-pinion is moved a greater or lesser distance either side of the center of disk o, thereby determining The shaft T/ carries the pinion T, meshing with pinion T5, feathered on the shaft T6. Shaft T also carries idler T7, which meshes with pinion T8 on the worm-shaft Q. The idler T7 and pinion T5 may be thrown out of gear by means of levers T10. Shaft T6 is provided at its extremity with worms which mesh respectively with pinions t i', surrounding and working upon the threaded rods aa before mentioned. The bearing-surfaces of these pinions are threaded to fit the thread on said rods. These pinions t are mounted in the frame B, and when they are rotated the said frame is carried or moved along the frame A on the tracks d. The shaft T is mounted in eccentric bearings, as shown in Fig. 2, and is adapted to be thrown toward or away from the disk o by means of lever T9 for the purpose of varying the pressure of the frictionpinion upon the face of the friction-disk, thereby determining at what amount of load the two surfaces will slip.

As before described, the worm shaft Q meshes with the gear p and turns or swings the cutter-arm on its ball-bearin g pivot. The swinging of the cutter-arm and the feeding or movement of the frame B along frame A are therefore accomplished directly through the friction-gear, the power being imparted to both through the same.

The cutter-arm swings perfectly free in a horizontal plane beneath the frame A, and, as will .be observed, its point of support may be anywhere along the length of the frame A. It is therefore possible to cut a square kerf with this machine.

The cutting-chain C is made up of cuttingteeth c c connected together by links c2. The links are of peculiar construction. They are 1 adapted to eut when the chain is moving in either direction-that is to say, each tooth has two cutting-edges. The cutting-edges, instead of being straight and continuous, are interrupted by openings or slots cil which form in fact a plurality of cutting-edges e c e. Each alternate tooth has three of these cutting-edges, while the others have two of them, and the cutting-edges of the teeth are opposite the spaces between the cutting-edges of the next adjacent teeth, so that although each tooth does not cut the full width of the kerf what is left by one tooth is removed by the next one. This form of tooth docs much more satisfactory work than the continuousedged tooth, for the reason that the latter scrapes or gouges a comparatively large surface, while the former disintegrates or tears. The chattering or vibrating of the straightedged tooth is also overcome by this improved tooth.

In operation the machine is set up close to the wall or breast of coal and the motor started. By throwing in one or the other of the bevel-pinions o o2 in accordance with the direction which it is desired the chain shall run the chain is started. Next the lever T9 is operated to throw the friction -pinion against o. This operates both feeding movevments of the cutter-arm which act together and automatically. The arm is therefore swung into the coal and its supporting-frame carried from one end to the other of the frame of the machine, thus cutting a hole or kerf in the coal, having one of its boundaries at substantially right angles to the breast or wall. The arm is then standing at right angles to the machine. The friction-pinion is then thrown to the other side of the center of the disk 0 in the manner hereinbefore described, and the shaft Q thrown out of connection with the shaft TJ' by sliding the idler T7 to one side. Then the frame B will reverse its motion and move back to the other end of frame A and carry the cutter-arm with it, maintaining the same at right angles to the machine. The arm may then be withdrawn from the kerf by throwing in shaft Q and throwing out the pinionst t by moving The machine has then cut a complete square kerf in the coal. It is obvious that the arm may perform the same movements on either side of the machine and that the several feeds maybe operated simultaneously or separately, as desired.

Having thus described my invention, I claim- In a coal-cutter, the combination with a motor and its shaft, of a counter-shaft passing between the field-magnet coils, bevel-pinions carried by the countershaft, a bevelgear with which said pinions are adapted to engage, a cutting-chain driven by said gear and a feeding mechanism driven by said counter-shaft whereby a compact and symmetrical machine is provided.

In witness whereof l have hereunto signed my name in the presence of two subscribing witnesses.

IMLE E. STOREY.

lVitnesses:

EDWARD A. XVAGNER, TERESA E. LYNCH.

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